Block Diagram; Components Description - Kenwood KAC-PS811D Service Manual

KAC-PS811D/X811D
(X09-5790-10)
IC1
ISO
LINE IN
LINE
OUT
IC16
to H/U
COMPARATOR
Q1-4
ISOLATOR
IC10
IC15
I2C
REMOTE BUFFER
IC11
RESET
IC
PREAMPLIFIER UNIT (X08-4170-10)
Ref. No
IC1 ISF
IC2 (1/4~3/4) BRF
IC2 (4/4) INV
IC3 OP amplifier
IC4 E-VOL
IC5 LPF
IC6 LCD driver
AUDIO UNIT (X09-5790-10)
Ref. No
IC1 Isolation amplifier
IC2 (1/2) Triangular wave generation
IC2 (2/2) Error amplifier
IC3 Comparator, Triangular wave generation
2

BLOCK DIAGRAM

(X08-4170-10)
IC1 IC2
I.F.S B.R.F
ON/OFF OFF/6/12
15/25Hz FREQ
ED1
LCD FREQ
BACK
LIGHT
IC5
IC3
IC6
L.P.F
LCD
LEVEL
DRIVER
THERMAL
PROTECT
AVR 5V
u-COM
ROM ACCRESS
CORRECT SWITCH

COMPONENTS DESCRIPTION

Application / Function
Application / Function
IC2
IND
INV
NOR/REV
FAN
Q10
IC4
IC3
AMP
MUTE
CONT.
ON/OFF
Q9
MUTE
DRIVER
Q80 IC14
POWER CURRENT
SWITCH DET.
SW5V 15V
Q25,26,
29,30,
IC13
Q20 84,110
+5V 15V
D.D CON
SWITCH AVR
Q106-108
+5V
AVR
Operation / Condition / Compatibility
Cutting super-low range of audio signal
Cutting bandwidth of audio signal
Phase reversal of audio signal
Voltage amplification, Buffer
Electronic volume
Cutting high-range of audio signal
LCD driver
Operation / Condition / Compatibility
Prevent noise from GND potential difference
Reference signal for digitizing analog signal
Error is compensated by the feedback from output
Digitizing by comparison of analog signal and triangular wave
Q15,18,19,21,22,27,
IC2,3 IC4,5 28,37-40,42-45,48-51
DEAD
COMPARATOR TIME AMP
CONT
IC2
Q52-55
OVER
TRIANGLE
IC6
LOAD
WAVE
DET.
Q63 Q83 Q66
INPUT OVER
FAN
VOLTAGE VOLTAGE
CONTROL
MEASURE DET.
SP OUT
Q73,
78
DC
OFFSET
DET.
Q62
P CON
DET.
DOWN
VOLTAGE
DET.
P CON
BATT
GND